Igniter for gas-stoves



A. 0. RUTZ.

IGNHER FOR GAS STOVES.

APPLICATION FILED FEB-7,1917- 13370317. Patented Mar. 8, 1921.

A. 0. RUTZ.

lGNlTER FOR GAS STOVES.

APPLiCATlON FILED FEB. 7, 1917.

1,370,917,, Patented Mar. 8,1921.

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A. O. RUTZ.

IGNITER FOR GAS STOVES.

APPLiCATlON FILED FEB-7.1917.

Patented Mar. 8, 1921.

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UNITED STATES PATENT OFFICE.

ARNOLD O. RUTZ, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO MILWAUKEE GAS SPECIALTY COMPANY OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- CONSIN'.

IGNI'IER FOR GAS-BTOVES.

To all whom it may concern:

Be it known that I, ARNOLD O. RUTZ, a citizen of the United States. residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Igniters for Gas-Stoves, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to igniters for gas stoves.

More particularly my invention provides a novel form of igniters for igniting the burners of gas ovens and the like. When an uninclosed burner is to be ignited no particular attention needs to be given to the matter of explosive mixtures as the gas is free to difluse and is quickly diluted to the point where it is not combustible. When a burner is located in an inclosed space as in an oven or broiler, care must be exercised not only to avoid the formation of explosive mixtures but also to prevent damage being done in case such mixture should be formed.

It has been found in operating domestic gas stoves that if the burner in the oven be turned on without igniting the same an explosive mixture will be formed in the oven and if then a match be applied to the burner an explosion occurs. This is sometimes of such violence as to wreck the oven and to cause injury to the operator or attendant. I have shown in a number of prior patents issued to me igniter means having a constantly burning pilot light which is adapted to project a flame from the pilot to the main burner to be ignited.

I desire to apply such a pilot light to an oven or broiler burner. If the pilot light were put inside the oven or broiler or if it were put on the outside in such fashion as to project a flame into the closed compartment it would introduce a possible element of danger to the operator due to negligence or ignorance which might cause an explosion as above pointed out.

My invention aims to overcome the above dangers by providing means which will prevent the use of the igniter until the closed body, such as the oven, has been opened to the atmosphere, so that ignition, even of an Specification of Letters Patent. Application nia February 7, 1917. Serial No.

Patented Mar. 8, 1921. 147,101.

explosive mixture can at the worst do little or no damage.

I have found that if the oven be opened as by opening the door before the igniter is operatednot only is there a tendency for the explosive mixture to be dissipated but whatever explosion will be caused will be of little effect because of the release afforded to the atmosphere. The opening of the door is a condition precedent to the operation of the lighter.

In the accompanying drawings which form a part of the present specification I have llustrated several different instances in WhlCh my invention can be embodied in the construction of a gas oven.

Figure 1 is a front-elevational view of a gas oven embodying my invention;

Fig. 2 is a fragmentary front-elevational view showing .the opening in the walls of the oven and the door guarding this opening;

Fig. 3 1s a vertical fragmentary section showing the connection between the door of the oven and the door for the igniter opening;v

Fig. 4 is a horizontal section showing the main burner and the igniter in plan view;

Fig. 5 is a fragmentary vertical section of a modification;

Fig. 6 is a similar view fication.

Fig. 7 is a sectional view of the igniter and valve therefor.

In Fig. 1 I have shown a gas stove of conventional construction comprising the supporting legs 1 which carry at their upper ends a frame 2 upon which the super-strucof another moditure is mounted. This super-structure comprises a broiler compartment 3, an oven compartment 4 and a plurality of open burners 5 as is well understood in the art. The broiler 3 is provided with a suitable door 6 to permit access to the compartment. The oven 4 is provided with a door 7 for permitting access to the same. Between these two compartments are mounted the burners 8 and 9 which may be of any preferred construction. A main gas supply pipe 10 rovides fuel to these burners by means of t e pipes 11 and 12. The pipe 12 is mounted in a horizontal position outside of the wall 13 of the oven, being supported in such position by means of the brackets 14. Gas is supplied from the pipe 12 to the burners 8 and 9 through the cooks 15 and 16 respectively.

The wall 13 of the oven is provided with w an aperture 17 before which is mounted the the main burners 8 and 9 that when the pressed a larger op igniter is operated as will be described later. flames are projected as shown at 22 and 23 into the oven above the main burners 8 and 9 in such position as to ignite the same.

The tip 19 is normally supplied with gas through a pipe 24 and through a small passageway 25 in the body of the valve, this passageway being adjusted by suitable means such as the screw 26 to permit a small flow of gas through the passage sufficient to maintain the pilot lighted.

The valve body 27 is also provided with a larger valve passage which is controlled by the valve 28 having the external operating member 29 in the form of a push button. This valve is connected by an elbow 30 and nipple 31 to the pipe 12.

The aperture 17 in the walls 13, 13 of the oven is normally closedofi completely by a swinging door 32 pivoted at 33 and having a pin 34 playing in a concentric slot 35. The pin 34 is adapted to be engaged by a cam member 36.

The door 7 of the oven 4 is provided with hinges at 37 and 37', these hinges being attached to the lower frame portion 38 of the door 7. A detachable cam member 36 is connected to the frame member 38 in such position-as to engage the pin 34 when the door 7 is opened.

3 The operation of the device thus far described 18 as follows: A small pilot frame is normally supported at the mouth of the openings 20 in a tip1 19 by gas coming from the main 12 throu the valve 27 by way of the passage 25. en the button 29 is ening for the admission of gas to the tip 19 1s uncovered and the pressure in the tip rises to such a point as to push the gas out through the openings 20 in jets which are rojected across the burners 8 and 9. When it is desired to light the oven, one or both of the valves 15 and 16 are opened to admit gas to the .burners 8 and 9, the door 7 of the oven is then opened so that the cam member 36 opens the ignition door 32 and the button 29 is then pressed whereby the flame is projected from the tips 19 across the main burners 8 and 9, igniting the same. If any attem t is made to project the flames 22, 23 into t e oven for lighting the main burners 8 and 9, such attempt will beunsuccessful so long as the door 7 is closed. This insures that under no circumstances will the gas be ignited whenthe main door 7 is closed. As above explained no violent explosion can occur and the tendency for; an explosive mixture to accumulate is reduced;

I wish to call particulariattention to the fact that my improved form 'of igniter may be attached to stoves already constructed by securing the nipple 31 in'place o-fthe present pilot light and in connectingthe-detachable cam 39 to the portion 38 of'the door 7 and mounting the obstructing door'32 either in front of or behind the opening 17. i

In Fig. 5 I have shown a modified form in which the valve 27 is mounted upon the side wall 13 of the oven and the hood 18 is supported directly in front of the aperture 17 which is normally opened. The valve is connected to the supply pipe l2through the pipe 40, the elbow 30 and the nipple 31, as previously described. A cam member 41 which may be attachable and detachable as previously described is connected to the frame portion 38 of the door 7, this cam member having a groove 42 in which the end of the stem 43 plays, the groove being provided with an off-set portion for depressing the valve stem 43. This portion of the groove is so placed that the door must be opened a substantial distance before the valve 27 is operated.

The general result and function of this construction is the same as that described in connection with Figs. 1 to 4 inclusive. Namely, that after the gas is turned on for the main burners 8 and 9 the igniter cannot be operated to ignite the same until the main door 7 has been opened. In this case, opening of the door 7 automatically operates the igniter to project the flames to the main burners and thus ignite the same.

In Fig. 6 I have illustrated a different modification in which the action is substantially like that shown in Fig. 5. According to this structure the valve 47 is provided with a yoke 46 which yoke supports the lower end of a rod 45 having a slot 48 sliding overa pin 49 in the yoke 46 and having a cam portion 50 adapted to engage and depress the stem 51 of the valve 47 so as to admit the gas to the igniter tip and project the fiame to the main burners 8 and 9. v

The upper end of the rod 45 is-connected pivotally to a detachable member 44 which is adapted to be connected to the frame portion 38 of the door 7.

The igniter hood 18 is mounted with its aperture 21 directly in front of the aperture 17 and no barrier is interposed between the igniter and the main burners.

The operation is as follows: When the door 7 is opened the cam portion 50 rides over the stem 51, depressing the stem and admitting gas to the igniter causing the same to project flames to the main burners.

This action is of very. short duration and ceases when the door 7 is wide open. It is impossible to operate the stem 51 by pushing down on the rod 45 as the same is prevented from being moved laterally by means of the .pin 49 and the slot 48.

gas oven having a an igniter having a pilot projecting the flame of said pilot light to said burner, a door for said oven, and means controlled by said door for preventing operation of said projecting means, said pilot and burner being or anized to provide a substantially uncon ned communication between the burner and the pilot when the door controlled means is operated.

2. In combination an oven providing a closed space, a burner in said oven, a door for said oven, a constantly burning pilot light outside of said oven, means for projecting the flame of said pilot light to said burner only when said door is open, the supply of gas to said pilot being independent of said main burners.

3. In combination, an oven having a door, a burner in said oven, an aperture through the walls of said oven, a constantly burning pilot igniter in front of said aperture means for projecting the flame of said pilot igniter to said main burner, said means being connected to the door of the oven and permitting projection of the flame of the pilotignlter to the main burner only when said oven door is open,

4. In combination, an oven having a main door, a burner in said oven, side walls surrounding said burner said side walls having an aperture therethrough, pilot igniter having a constantly burning ame ad acent said aperture, said igniter being organized to project the flame of said pilot igniter through said aperture to said main burner and means governed by the position of said main door for governing the projection of the flame of said pilotto said burner.

5. In combinatlon an oven having a main burner, a main door for said oven, side walls surrounding said burner, said side walls having an aperture therethrough, a constantly burning pilot in front of said aperture, said pilot being organized to project a substantially unconfined flame through said aperture to said main burners to ignite the same and cam means mounted on'the door of the oven for controlling the projec tion of said flame into said oven.

6. In combination a gas oven having a burner therein, an igniter having a constantly burning pilot light, means for projecting the flame of said pilot light to said burner and a door for said oven, the opening of said door being a condition precedent to the operation of said projecting means.

In witness whereof I hereunto subscribe my name this 1st day of February, A. D.

ARNOLD O. RUTZ. 

